Gwen Stefani debuts new song ‘Used to Love You’

Gwen Stefani debuted a new song called “Used to Love You” at her concert Saturday.

Heartbroken singer Gwen Stefani holds nothing back in a new, bluntly named ballad about her recent breakup.

The “Don’t Speak” crooner stunned fans at her New York City concert Saturday when she unexpectedly premiered a personal new song titled “Used to Love You” — just two months after her highly publicized split from husband Gavin Rossdale.

“I just want to share a song that I wrote recently,” Stefani told the audience at the Hammerstein Ballroom. “This song is really special. I think this is gonna be the new single.”

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The 46-year-old singer then belted the song’s jaded lyrics as a video clip of her holding back tears streamed behind her.

“I thought I was the best thing that ever happened to you,” she sang, before later adding: “There were no boundaries, but you just pushed me too far. I guess nobody taught you, nobody taught you how to love.”

Stefani and Rossdale, who is the lead singer of English rock band Bush, announced they were filing for divorce in August after nearly 13 years of marriage, citing irreconcilable differences. The former lovers, who met in 1995, have three sons together.

“While the two of us have come to the mutual decision that we will no longer be partners in marriage, we remain partners in parenthood and are committed to jointly raising our three sons in a happy and healthy environment,” the stars said in a statement.

TMZ reported soon after the announcement that Stefani separated from Rossdale because she believed he cheated on her, and a source told the celebrity gossip site that their split was “a long time coming.”

Stefani hasn’t allowed the separation to hinder her professional career, however.

In addition to writing her passionate new track, the former No Doubt front woman currently serves as a judge on NBC’s highly rated singing competition, “The Voice.”